Knife sharpener



Jan. 23, 1934. G. R. weon 1,944,702

KNIFE SHARPENER Filed NOV. 27, 1931 w C -mM-.451g m m ATTORNEY- Patented Jan. 23, 1934 UNITED STATES PATENT OFFICE KNIFE SHARPENER Business Machines Corporation, New York,

N. Y., a corporation of New York Application November 27, 1931 Serial No. 577,543

2 Claims.

This case relates to a grinder attachment for slicing machines.

The object of the invention is to provide a novel attachment for a slicing machine which may be used to sharpen butchers knives or the like when desired.

Various other objects and advantages of my invention will be obvious from the following particular description of one form of mechanism embodying the invention or from an inspection of the accompanying drawing; and the invention also constitutes certain new and novel features of the construction and combination of parts hereinafter set forth and claimed.

In the drawing:

Fig. 1 is a view of the right side of the slicing machine provided with the attachment, and

Fig. 2 is a section on line 2 2 of Fig. l.

Referring to the drawing in detail, 10 is the frame of the machine provided with rails l1 and 12 for guiding the meat holding carriage 13 which traverses the gage plate 14 and knife 15. The latter is centrally recessed to receive a guard or cover plate 16 which has upper divergent ears 17 and a lower offset 18 secured to the frame.

The knife 15 is rigidly carried by a pulley 20 rotated by a belt 21 from a pulley 22 driven by a motor shaft or by any other suitable means. The upper edge of the knife is guarded in the hollow of an overhanging curved projection or extension 23 from the side of a casing 24 which is hinged at one end at 25 to the frame and releasably connected at the other end to the frame by a thumb screw 26 freely passing through the member 24 and threaded into the frame. A spring 27 surrounding the shank of the screw holds the guard member 24 in a predetermined position relative to the knife edge and frame. By adjusting the screw the spring pressure may be carried and the member 24 accordingly moved closer or farther from the knife edge.

Between the sides of casing 24 is journaled a shaft 30 on which is carried a grinding wheel 31. The Wheel is substantially enclosed by the casing, the greater part of its periphery being guarded by the end Walls 32 of the casing. The upper portion of the grinding Wheel projects above the casing.

In normal position of the casing 24, the lower edge of the grinding Wheel is free of contact with the upper reach of the belt 21. This is also the position of the casing when the slicing machine is being used to slice articles on carriage 13. When it is desired to employ the grindstone 31 to sharpen butchers knives, blades, or the like,

the operator depresses the casing 24 against resistance of spring 27 thus engaging the grindstone with the belt 21 which thereupon rotates the grindstone. The grindstone is then utilized as an ordinary grinding wheel to sharpen a knife held by the operator against the periphery of the wheel.

If it is desired to maintain the grindstone in this operative position, the screw 26 is turned to compress spring 27 and hold the casing 24 65 depressed.

The casing 24 and the grindstone carried thereby constitute a unit which may be easily attached to a slicing machine. k

While there has been shown and described and pointed out the fundamental novel features of the invention as applied to a single modification, it will be understood that various omissions and substitutions and changes in the form and details of the device illustrated and in its operation may be made by those skilled inthe art without departing from the spirit of the inven-` tion. It is the intention therefore to be limited only as indicated by the scope of the following claims. Y

1. A sharpening attachment for a slicing machinehaving a knife, a frame on which the knife is mounted, a vguard for a portion of the knife edge, and driving means for the knife located contiguous to one side of said knife and substantially concealed by the frame; characterized by the provision of a knife grinding device carried by aforesaid guard, said guard being movable towards the driving means to engage or disengage the grinding device for driving coaction with aforesaid driving means.

2. A sharpening attachment such as defined in claim 1, in which said driving means comprises a pulley fixed to the knife and a belt passing around the pulley for driving the knife, further characterized by the fact that the grinding device is adapted to engage and be driven by the belt when the knife guard is moved towards the belt.

GEORGE R. WOOD. 

